Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by Enhancing the fluid pumping rate Keeping the heat transfer surface clean Increasing the tube length None of these Enhancing the fluid pumping rate Keeping the heat transfer surface clean Increasing the tube length None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 44 min 15 min 51 min 22 min 44 min 15 min 51 min 22 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer _______ paint has the maximum absorption coefficient. Black Grey White Yellow Black Grey White Yellow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of 'n' is exactly 4 for A black body Black painted bodies only All bodies Polished bodies only A black body Black painted bodies only All bodies Polished bodies only ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) K/h0 h0/K 2K/h0 h0/2K K/h0 h0/K 2K/h0 h0/2K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that There is no internal heat generation Material is anisotropic Boundary surfaces are isothermal Constant temperature gradient exists There is no internal heat generation Material is anisotropic Boundary surfaces are isothermal Constant temperature gradient exists ANSWER DOWNLOAD EXAMIANS APP
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